Study: 2,000 convicted, exonerated in 23 years

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WASHINGTON More than 2,000 people who were falsely convicted of serious crimes have been exonerated in the United States in the past 23 years, according to a new archive compiled at two universities.

The database compiled and analyzed by the researchers contains information on 873 exonerations for which they have the most detailed evidence. The researchers are aware of nearly 1,200 other exonerations, for which they have less data.

They found that those 873 exonerated defendants spent a combined total of more than 10,000 years in prison, an average of more than 11 years each. Nine out of 10 of them are men and half are African American.

Nearly half of the 873 exonerations were homicide cases, including 101 death sentences. Over one-third of the cases were sexual assaults.

DNA evidence led to exoneration in nearly one-third of the 416 homicides and in nearly two-thirds of the 305 sexual assaults.

Researchers estimate the total number of felony convictions in the United States is nearly a million a year.

The overall registry/list begins at the start of 1989. It gives an unprecedented view of the scope of the problem of wrongful convictions in the United States and the figure of more than 2,000 exonerations “is a good start,” said Rob Warden, executive director of the Center on Wrongful Convictions.

“We know there are many more that we haven't found,” added University of Michigan law professor Samuel Gross, the editor of the newly opened National Registry of Exonerations.

Counties such as California's San Bernardino and Bexar County in Texas are heavily populated, yet seemingly have no exonerations, a circumstance that the academics say cannot possibly be correct.

In half of the 873 exonerations studied in detail, the most common factor leading to false convictions was perjured testimony or false accusations. Forty-three percent of the cases involved mistaken eyewitness identification, and 24 percent of the cases involved false or misleading forensic evidence.

In two out of three homicides, perjury or false accusation was the most common factor leading to false conviction. In four out of five sexual assaults, mistaken eyewitness identification was the leading cause of false conviction.

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